A smoke exhaust hood with linkage between a smoke exhaust plate and a lifting air guide base

Abstract

This invention discloses a range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction, comprising a main unit, an air handling unit, a smoke extraction module, an air guide seat, and a smoke guide plate. A smoke inlet and a lifting port are located below the air handling unit. An oil filter is installed at the smoke inlet. The air guide seat is vertically mounted within the lifting port via a guiding mechanism and moves up and down under the drive of a lifting power mechanism. An auxiliary smoke extraction port is located at the front end of the air guide seat, and is connected to the smoke extraction module via the inner cavity of the air guide seat and the inner cavity of the main unit. The smoke guide plate is hinged to the main unit via a swing arm, which is connected to the air guide seat via a linkage mechanism, so that when the air guide seat rises and falls, it drives the smoke guide plate to open or block the smoke inlet simultaneously. This structure can create close-range auxiliary smoke extraction when the air guide seat descends, and simultaneously open the smoke guide plate to gather and guide smoke, reducing smoke escape, simplifying the drive structure, and improving the smoke extraction effect.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, specifically to a range hood, and more particularly to a range hood in which the smoke guide plate and the lifting air guide seat open and close in conjunction. Background Technology

[0002] Range hoods are commonly used ventilation devices in kitchens. They are mainly used to absorb and remove fumes, moisture, and odors generated above cookware during cooking, thereby improving the air quality in the kitchen. Existing range hoods mainly include top-mounted range hoods, side-mounted range hoods, and some composite range hoods with smoke guide plates.

[0003] Existing top-mounted range hoods typically place the smoke inlet at or near the top of the unit. After cooking fumes are generated at the cookware, they need to rise a certain distance before reaching the smoke inlet and being absorbed. During this upward drift, factors such as hot airflow, cooking actions, and kitchen air circulation cause the fumes to easily spread in front of the range hood, to the sides, and throughout the kitchen space. Especially in scenarios with high fumes, such as stir-frying and deep-frying, some fumes escape before even reaching the smoke inlet, resulting in top-mounted range hoods having long smoke extraction paths, insufficient smoke collection capacity, and poor smoke absorption.

[0004] To address these issues, some existing range hoods incorporate smoke guides in the smoke inlet area. These guides shield, collect, or direct the cooking fumes, directing them towards the inlet. However, most existing smoke guides function merely as simple tilting baffles, primarily altering the direction of fume flow rather than actively shortening the distance between the fume source and the smoke inlet. Therefore, even with the guide open, the fumes still need to rise to a higher position before being absorbed, resulting in limited improvement in smoke extraction efficiency.

[0005] Therefore, it is necessary to provide a range hood with a more reasonable structure, which can form an auxiliary smoke inlet close to the source of oil fumes during operation, and at the same time, the smoke guide plate can open or close synchronously with the lifting smoke structure, thereby improving smoke extraction efficiency, reducing oil fume escape, and simplifying the overall drive and transmission structure. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a range hood in which the smoke guide plate and the lifting air guide seat open and close in conjunction. The smoke guide plate can be opened and closed synchronously by the lifting movement of the air guide seat. When the air guide seat descends to form an auxiliary smoke inlet, the smoke guide plate opens the smoke inlet simultaneously. When the air guide seat rises and retracts, the smoke guide plate blocks the smoke inlet simultaneously, thereby improving the smoke adsorption effect, reducing smoke escape, and simplifying the transmission structure of the whole machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a range hood with a smoke guide plate and a lifting air guide seat that open and close in linkage, comprising a main unit, an air cabinet installed on the top of the main unit, a smoke extraction module installed inside the air cabinet, the air inlet of the smoke extraction module communicating with the inner cavity of the main unit, and the air outlet of the smoke extraction module communicating with the smoke exhaust seat set on the top of the air cabinet.

[0008] The air handling unit has a smoke inlet and a lifting port at its bottom. An oil filter screen is installed at the smoke inlet. An air guide seat is slidably installed in the lifting port through a guide mechanism. The air guide seat moves up and down along the lifting port under the drive of the lifting power mechanism.

[0009] The air guide seat has an inner cavity, and an auxiliary smoke inlet is provided at the front end of the air guide seat. The auxiliary smoke inlet is connected to the smoke module through the inner cavity of the air guide seat and the inner cavity of the main unit.

[0010] A smoke guide plate is provided on the outside of the smoke inlet. The smoke guide plate is hinged to the main unit via a swing arm. The swing arm is connected to the air guide seat via a linkage mechanism.

[0011] When the air guide seat is raised or lowered, the linkage mechanism converts the vertical linear motion of the air guide seat into the rotation of the swing arm, so as to drive the smoke guide plate to open or block the smoke inlet.

[0012] Furthermore, the guiding mechanism includes a guide rail fixedly installed inside the lifting port, and correspondingly, a slider is provided on the air guide seat, the slider being slidably connected to the guide rail.

[0013] Furthermore, two sets of guide rails and sliders are provided, and the two sets of guide rails and sliders are symmetrically distributed on the back of the air guide seat.

[0014] Furthermore, the lifting power mechanism includes an electric push rod fixedly installed inside the main unit, and the movable end of the electric push rod is connected to the air guide seat to drive the air guide seat to move up and down along the lifting port.

[0015] Furthermore, there are two swing arms, which are symmetrically distributed on both sides of the smoke guide plate; the main unit is provided with a hinge seat, one end of each swing arm is hinged to the corresponding hinge seat, and the other end is fixedly connected to the back of the smoke guide plate.

[0016] Furthermore, the linkage mechanism is provided in two sets, which are symmetrically distributed on both sides of the main unit. Each linkage mechanism includes a first link, a second link, and a third link. The first link is hinged to the main unit through a hinge joint, and a first connecting part and a second connecting part are provided on the first link at intervals. The first connecting part is hinged to one end of the third link, and the other end of the third link is hinged to the air guide seat. The second connecting part is hinged to one end of the second link, and the other end of the second link is hinged to the swing arm.

[0017] When the air guide seat is raised or lowered, the air guide seat drives the first link to swing around the hinge part through the third link. The first link drives the swing arm to rotate through the second link, thereby driving the smoke guide plate to open or block the smoke inlet.

[0018] Furthermore, mounting cavities are provided on both sides of the main unit, and two sets of linkage mechanisms and two swing arms are respectively installed in the corresponding mounting cavities.

[0019] Furthermore, the front end of the air guide seat is provided with an inwardly recessed arc-shaped air guide plate, and the auxiliary smoke inlet is opened on the arc-shaped air guide plate.

[0020] Furthermore, the front end of the air guide seat has an opening, and the lower end of the arc-shaped air guide plate is hinged to the lower part of the opening. Guide wheels are provided on both sides of the arc-shaped air guide plate, and the guide wheels extend into the guide grooves provided on the side wall of the lifting port. When the air guide seat rises to the storage position, the guide wheels are guided by the guide grooves to retract the arc-shaped air guide plate into the inner cavity of the main unit. When the air guide seat descends to the working position, the guide wheels are guided by the guide grooves to expand the arc-shaped air guide plate outward.

[0021] Furthermore, the left and right sides of the arc-shaped air guide plate extend backward to form side plates.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention provides a smoke inlet at the bottom of the fan cabinet and an auxiliary smoke inlet at the front end of the liftable air guide seat. This allows the range hood to not only absorb rising fumes through the smoke inlet but also to provide auxiliary smoke extraction at a position closer to the source of the fumes through the lowered air guide seat, thereby shortening the path of the fumes into the smoke inlet and reducing the diffusion and escape of the fumes.

[0023] 2. This invention converts the linear motion of the air guide seat into the rotation of the swing arm through a linkage mechanism, enabling the air guide seat to simultaneously drive the smoke guide plate to open and close when it rises and falls. Compared with structures where the air guide seat and smoke guide plate have separate drive mechanisms, this invention has a more compact structure, a clearer transmission relationship, and can reduce manufacturing costs and assembly difficulty.

[0024] 3. When the air guide seat descends to the working position, the smoke guide plate simultaneously opens the smoke inlet, which helps to expand the smoke collection range and form a smooth oil fume flow channel; when the air guide seat rises to the storage position, the smoke guide plate simultaneously blocks the smoke inlet, which helps to keep the overall appearance of the machine clean and reduces the entry of dust and impurities into the machine body.

[0025] 4. The linkage mechanism is symmetrically arranged on both sides of the main unit and installed in the mounting cavity respectively, so that the smoke guide plate is subjected to balanced force on both sides, the opening and closing action is stable, and it is not easy to wobble, jam or shake.

[0026] 5. The front end of the air guide seat is equipped with an inwardly recessed arc-shaped air guide plate, and the auxiliary smoke inlet is opened on the arc-shaped air guide plate, which is conducive to the collection and guidance of oil fumes and improves the smoke extraction efficiency at the auxiliary smoke inlet.

[0027] 6. The arc-shaped air guide plate unfolds and retracts through the cooperation of guide wheels and guide grooves, enabling the air guide base to automatically adjust the posture of the arc-shaped air guide plate during the lifting and lowering process, further improving the convenience of use and the structural linkage. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention in its stored state.

[0029] Figure 2 This is a schematic diagram of the overall structure of the present invention in the open state of the smoke guide plate.

[0030] Figure 3 This is a schematic diagram of the internal structure from another perspective of the present invention.

[0031] Figure 4 In this invention Figure 3 A magnified view of the local structure.

[0032] Figure 5 This is a cross-sectional view of the structure of the present invention in the open state of the smoke guide plate.

[0033] Figure 6 This is a schematic diagram of the smoke guide plate assembly of the present invention.

[0034] Figure 7 This is a schematic diagram of the structure of the smoke guide plate assembly of the present invention in the state of being separated from the main unit.

[0035] Figure 8 This is a schematic diagram of the inner structure of the smoke guide plate of the present invention.

[0036] Explanation of reference numerals in the attached figures: 1. Main unit; 2. Air handling unit; 3. Smoke extraction module; 4. Smoke exhaust seat; 5. Air guide seat; 6. Guiding mechanism; 7. Lifting power mechanism; 8. Smoke guide plate; 9. Swing arm; 10. Linkage mechanism; 11. Hinge seat; 12. Mounting cavity; 13. Arc-shaped air guide plate; 14. Guide groove; 15. Smoke inlet; 16. Lifting port; 17. Oil filter screen; 18. Auxiliary smoke extraction port; 19. Opening mouth; 20. Guide rail; 21. Slider; 22. Electric push rod; 23. Movable end; 24. First connecting rod; 25. Second connecting rod; 26. Third connecting rod; 27. Hinge part; 28. First connecting part; 29. ​​Second connecting part; 30. Guide wheel; 31. Side plate. Detailed Implementation

[0037] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be understood that the following embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] like Figures 1 to 8 As shown, this embodiment provides a range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction. It includes a main unit 1, which serves as the main mounting structure of the range hood, housing the oil filter structure, smoke guide structure, lifting structure, and related transmission mechanisms. A fan housing 2 is mounted on the top of the main unit 1, and a smoke extraction module 3 is installed inside the fan housing 2. The smoke extraction module 3 acts as a fan assembly, creating negative pressure suction within the main unit 1. The air inlet of the smoke extraction module 3 communicates with the inner cavity of the main unit 1, and the air outlet of the smoke extraction module 3 communicates with a smoke exhaust seat 4 located on the top of the fan housing 2, allowing the fumes entering the inner cavity of the main unit 1 to be drawn in by the smoke extraction module 3 and discharged through the smoke exhaust seat 4.

[0039] Below the air handling unit 2, there is a smoke inlet 15 and a lifting port 16. The smoke inlet 15 is used to allow oil fumes to enter the inner cavity of the main unit 1. An oil filter 17 is installed at the smoke inlet 15 to filter and separate grease particles in the oil fumes, thereby reducing the amount of oil entering the smoke extraction module 3. The lifting port 16 is used to allow the air guide seat 5 to move up and down, so that the air guide seat 5 can switch between a storage position and a working position.

[0040] The air guide seat 5 is slidably mounted up and down within the lifting port 16 via the guide mechanism 6. Specifically, the guide mechanism 6 includes a guide rail 20 fixedly mounted within the lifting port 16, and a slider 21 that cooperates with the guide rail 20 on the air guide seat 5. The slider 21 is slidably connected to the guide rail 20. When the air guide seat 5 is raised or lowered, the slider 21 slides along the guide rail 20, thereby ensuring that the air guide seat 5 rises and falls smoothly in a predetermined direction and preventing the air guide seat 5 from tilting or swaying during the raising and lowering process.

[0041] In this embodiment, two sets of guide rails 20 and sliders 21 are provided, and the two sets of guide rails 20 and sliders 21 are symmetrically distributed on the back of the air guide seat 5. By symmetrically arranging the guide structure, the lifting stability of the air guide seat 5 can be improved, so that the air guide seat 5 can still maintain smooth movement during long-term use.

[0042] Driven by the lifting mechanism 7, the air guide seat 5 moves up and down along the lifting port 16. In this embodiment, the lifting mechanism 7 includes an electric push rod 22 fixedly installed inside the main unit 1, and the movable end 23 of the electric push rod 22 is connected to the air guide seat 5. When the movable end 23 of the electric push rod 22 extends or retracts, the movable end 23 directly drives the air guide seat 5 to descend or rise along the lifting port 16. When the air guide seat 5 descends, its front end is close to the oil fume generating area above the stove; when the air guide seat 5 rises, it can return to the storage position below the main unit 1 or the air cabinet 2.

[0043] The air guide seat 5 has an inner cavity, and an auxiliary smoke inlet 18 is provided at the front end of the air guide seat 5. The auxiliary smoke inlet 18 is connected to the smoke extraction module 3 through the inner cavity of the air guide seat and the inner cavity of the main unit 1. When the range hood is working, the smoke extraction module 3 creates a negative pressure in the main unit 1. Some of the oil fumes enter the inner cavity of the main unit 1 through the smoke inlet 15, and the other part of the oil fumes enters the inner cavity of the air guide seat through the auxiliary smoke inlet 18 at the front end of the air guide seat 5, then enters the inner cavity of the main unit 1 and is discharged by the smoke extraction module 3. Since the auxiliary smoke inlet 18 can descend with the air guide seat 5 to a position closer to the source of oil fumes, it can promptly absorb oil fumes that have not yet spread widely.

[0044] A smoke guide plate 8 is provided on the outside of the smoke inlet 15. The smoke guide plate 8 is used to collect and guide the oil fumes when it is open, so that the oil fumes can flow more smoothly to the smoke inlet 15 and the auxiliary smoke inlet 18; when it is closed, the smoke guide plate 8 can cover the smoke inlet 15, making the range hood look cleaner and reducing the entry of external impurities into the smoke inlet 15.

[0045] The smoke guide plate 8 is hinged to the main unit 1 via a swing arm 9. Specifically, there are two swing arms 9, symmetrically distributed on both sides of the smoke guide plate 8. The main unit 1 contains a hinge seat 11, and one end of each swing arm 9 is hinged to the corresponding hinge seat 11, while the other end is fixedly connected to the back of the smoke guide plate 8. When the smoke guide plate 8 opens and closes, the swing arm 9 rotates around the hinge seat 11, thereby causing the smoke guide plate 8 to swing relative to the main unit 1.

[0046] To achieve linkage between the air guide seat 5 and the smoke guide plate 8, the swing arm 9 is connected to the air guide seat 5 through the linkage mechanism 10. When the air guide seat 5 rises or falls, the linkage mechanism 10 converts the vertical linear motion of the air guide seat 5 into the rotation of the swing arm 9, thereby driving the smoke guide plate 8 to open or block the smoke inlet 15.

[0047] Specifically, two sets of linkage mechanisms 10 are provided, symmetrically distributed on both sides of the main unit 1. Each set of linkage mechanisms 10 includes a first connecting rod 24, a second connecting rod 25, and a third connecting rod 26. The first connecting rod 24 is hinged to the main unit 1 via a hinge part 27, and the first connecting rod 24 can swing around the hinge part 27. A first connecting part 28 and a second connecting part 29 are provided on the first connecting rod 24 at intervals. The first connecting part 28 is hinged to one end of the third connecting rod 26, and the other end of the third connecting rod 26 is hinged to the air guide seat 5; the second connecting part 29 is hinged to one end of the second connecting rod 25, and the other end of the second connecting rod 25 is hinged to the swing arm 9.

[0048] When the air guide seat 5 descends, it drives the third link 26 to move downwards synchronously. Since one end of the third link 26 is hinged to the air guide seat 5 and the other end is hinged to the first connecting part 28 of the first link 24, the third link 26 will exert a pulling or pushing force on the first connecting part 28, causing the first link 24 to swing around the hinge part 27. When the first link 24 swings, the second connecting part 29 changes position synchronously with the first link 24, and drives the swing arm 9 to rotate around the hinge seat 11 through the second link 25. After the swing arm 9 rotates, it drives the smoke guide plate 8 fixed on the swing arm 9 to flip outwards, thereby opening the smoke inlet 15.

[0049] When the air guide seat 5 rises, the above transmission process is reversed. The air guide seat 5 drives the third link 26 to move upward, the third link 26 drives the first link 24 to swing in the opposite direction around the hinge 27, and the first link 24 then drives the swing arm 9 to rotate in the opposite direction through the second link 25, so that the smoke guide plate 8 gradually returns to the position of blocking the smoke inlet 15. Thus, the lifting and lowering movement of the air guide seat 5 can be synchronously converted into the opening and closing movement of the smoke guide plate 8 through the linkage mechanism 10, without the need to set up a separate drive component for the smoke guide plate 8.

[0050] The main unit 1 has mounting cavities 12 on both sides, and two sets of linkage mechanisms 10 and two swing arms 9 are respectively installed in the corresponding mounting cavities 12. By setting up the mounting cavities 12, the linkage mechanisms 10 and swing arms 9 can be protected, avoiding oil, water vapor or foreign objects from directly affecting the movement of the linkage, and at the same time, it is also conducive to a more compact internal structure of the whole machine.

[0051] Furthermore, the front end of the air guide seat 5 is provided with an inwardly recessed arc-shaped air guide plate 13, and the auxiliary smoke inlet 18 is opened on the arc-shaped air guide plate 13. The arc-shaped air guide plate 13 can form a certain gathering and guiding effect on the oil fumes, making it easier for the oil fumes to concentrate towards the auxiliary smoke inlet 18, thereby improving the adsorption efficiency of the auxiliary smoke inlet 18.

[0052] The air guide seat 5 has an opening 19 at its front end, and the lower end of the arc-shaped air guide plate 13 is hinged to the lower part of the opening 19. Guide wheels 30 are provided on both sides of the arc-shaped air guide plate 13, and the guide wheels 30 extend into the guide grooves 14 provided on the side wall of the lifting port 16. When the air guide seat 5 is raised and lowered, the guide wheels 30 move along the guide grooves 14, and the guide grooves 14 guide the guide wheels 30, thereby controlling the rotation posture of the arc-shaped air guide plate 13.

[0053] When the air guide seat 5 rises to the storage position, the guide wheel 30, guided by the guide groove 14, drives the arc-shaped air guide plate 13 to rotate inward, so that the arc-shaped air guide plate 13 is retracted into the inner cavity of the main unit 1. This avoids the arc-shaped air guide plate 13 from being exposed and occupying space, and improves the appearance integrity of the whole machine in the stored state.

[0054] When the air guide seat 5 descends to the working position, the guide wheel 30 is guided by the guide groove 14, causing the arc-shaped air guide plate 13 to unfold outward. At this time, the arc-shaped air guide plate 13 moves the auxiliary smoke inlet 18 to a position that is more conducive to adsorbing oil fumes, so that the auxiliary smoke inlet 18 can adsorb the oil fumes generated during cooking at close range.

[0055] To further improve the smoke guiding effect, the left and right sides of the arc-shaped air guide plate 13 extend backward to form side plates 31. The side plates 31 can form smoke-blocking boundaries on both sides of the arc-shaped air guide plate 13, reducing the diffusion of oil fumes to both sides and allowing more oil fumes to be guided to the auxiliary smoke inlet 18 and the smoke inlet 15.

[0056] Working principle The working principle of this invention includes the storage state, the start-up and descent process, the working smoke extraction process, and the shut-off and reset process.

[0057] When not in operation or in the retracted state, the air guide seat 5 is located in the upper retracted position within the lifting port 16. At this time, the movable end 23 of the electric push rod 22 is in a retracted state or remains in the predetermined retracted position, and the air guide seat 5 is completely retracted into the area below the main unit 1 or the air handling unit 2. The smoke guide plate 8, driven by the swing arm 9, is positioned to block the smoke inlet 15, preventing the smoke inlet 15 from being directly exposed. The arc-shaped air guide plate 13 retracts inward under the cooperation of the guide wheel 30 and the guide groove 14, and is retracted into the inner cavity of the main unit 1. At this time, the overall appearance of the machine is relatively flat, and the smoke inlet 15, the auxiliary smoke inlet 18, and the internal transmission structure are all in a relatively retracted state, which can reduce the entry of dust, foreign objects, or oil stains into the machine body.

[0058] When the user turns on the range hood, the smoke extraction module 3 starts working, creating negative pressure in the inner cavity of the main unit 1 and the inner cavity of the air guide seat 5. Simultaneously, the lifting mechanism 7 activates, and the movable end 23 of the electric push rod 22 extends and pushes the air guide seat 5 downwards along the lifting opening 16. During the descent of the air guide seat 5, the slider 21 slides along the guide rail 20, which limits and guides the air guide seat 5, ensuring stable vertical movement and preventing lateral swaying or back-and-forth movement during descent.

[0059] When the air guide seat 5 moves downward, the third link 26, which is hinged to the air guide seat 5, moves synchronously with the air guide seat 5. Since the other end of the third link 26 is hinged to the first connecting part 28 of the first link 24, the third link 26 transmits the vertical linear displacement of the air guide seat 5 to the first link 24, causing the first link 24 to swing around its hinge part 27. During the swinging process of the first link 24, its second connecting part 29 also changes position, and drives the swing arm 9 to rotate around the hinge seat 11 through the second link 25. When the swing arm 9 rotates, the smoke guide plate 8 fixed on the swing arm 9 flips outward synchronously, thereby gradually opening the smoke inlet 15.

[0060] In other words, as the air guide seat 5 descends, the smoke guide plate 8 does not open using a separate motor or independent drive component. Instead, it opens synchronously through the mechanical transmission relationship between the third link 26, the first link 24, the second link 25, and the swing arm 9. This process maintains a mechanical linkage between the descent of the air guide seat 5 and the opening of the smoke guide plate 8, avoiding problems such as the air guide seat 5 descending to its final position without the smoke guide plate 8 opening, or the smoke guide plate 8 opening first but the air guide seat 5 not descending to its final position.

[0061] As the air guide seat 5 continues to descend, the guide wheels 30 located on both sides of the arc-shaped air guide plate 13 move along the guide groove 14. Because the guide groove 14 has a predetermined guiding trajectory, the guide wheels 30 not only descend with the air guide seat 5 during movement but are also limited by the guide groove 14, thereby causing the arc-shaped air guide plate 13 to gradually unfold outwards around its lower hinge position. When the air guide seat 5 descends to the working position, the arc-shaped air guide plate 13 unfolds to a predetermined angle, and the auxiliary smoke inlet 18 moves closer to the fume-generating area along with the arc-shaped air guide plate 13.

[0062] During the fume extraction process, the fumes generated above the cookware rise due to thermal buoyancy, while simultaneously being drawn by the negative pressure created by the fume extraction module 3. At this time, the guide plate 8 is already open and located outside the smoke inlet 15, which can block and guide the outward-spreading fumes, causing them to converge near the smoke inlet 15 and the auxiliary smoke extraction port 18. After the air guide seat 5 descends, the position of the auxiliary smoke extraction port 18 is lower than the top smoke inlet area of ​​a traditional top-mounted range hood, enabling it to adsorb the fumes at close range when they have just risen and have not yet spread widely.

[0063] A portion of the fumes enters the smoke inlet 15 upwards under the guidance of the smoke guide plate 8, and after being filtered by the oil filter 17, enters the inner cavity of the main unit 1. The oil filter 17 can initially intercept grease particles in the fumes, reducing the amount of grease entering the smoke extraction module 3. Another portion of the fumes enters the auxiliary smoke extraction port 18 under negative pressure, then enters the inner cavity of the air guide seat 5, and then enters the inner cavity of the main unit 1 from the air guide seat 5. The fumes entering the inner cavity of the main unit 1 are finally sucked into the smoke extraction module 3 and discharged through the smoke exhaust seat 4.

[0064] Because the smoke inlet 15 and the auxiliary smoke inlet 18 work together to draw in smoke, the range hood employs a combined top-down and bottom-down smoke extraction method during operation. The smoke inlet 15 primarily absorbs the rising fumes below the hood, while the auxiliary smoke inlet 18 absorbs fumes that have not yet dispersed near the source. When the guide plate 8 is opened, it creates a space for collecting and guiding smoke. The arc-shaped air guide plate 13 and the side plates 31 further restrict the escape of fumes forward and to the sides, causing the fumes to flow more concentratedly towards the smoke inlet 15 and the auxiliary smoke inlet 18, thereby improving the overall smoke extraction effect.

[0065] When the user turns off the range hood or needs to store it, the lifting mechanism 7 reverses its movement, the movable end 23 of the electric push rod 22 retracts, and drives the air guide seat 5 to move upward along the lifting port 16. As the air guide seat 5 rises, the third connecting rod 26 moves upward with the air guide seat 5, and drives the first connecting rod 24 to swing in the opposite direction around the hinge 27. After the first connecting rod 24 swings in the opposite direction, it drives the second connecting rod 25 to move in the opposite direction through the second connecting part 29. The second connecting rod 25 then drives the swing arm 9 to rotate in the opposite direction around the hinge seat 11. When the swing arm 9 rotates in the opposite direction, the smoke guide plate 8 swings back towards the smoke inlet 15, finally blocking the smoke inlet 15.

[0066] Simultaneously, as the air guide seat 5 rises, the guide wheel 30 moves in the opposite direction along the guide groove 14. The guide groove 14 applies a reverse guiding action to the guide wheel 30, causing the arc-shaped air guide plate 13 to rotate inward around its lower hinge position and gradually retract into the opening 19 and the inner cavity of the main unit 1. When the air guide seat 5 rises to the retracted position, the arc-shaped air guide plate 13 is retracted, and the auxiliary smoke inlet 18 also returns to the inside of the machine body or a position close to the inside of the machine body along with the air guide seat 5. The smoke guide plate 8 simultaneously blocks the smoke inlet 15, and the entire machine returns to the retracted state.

[0067] As can be seen from the above working process, this invention utilizes a lifting power mechanism 7 to drive the air guide seat 5 to rise and fall, and through a linkage mechanism 10, converts the linear lifting motion of the air guide seat 5 into the opening and closing motion of the smoke guide plate 8. Simultaneously, the arc-shaped air guide plate 13 is unfolded and retracted with the cooperation of the guide wheel 30 and the guide groove 14. A clear and synchronized mechanical linkage relationship is formed between the air guide seat 5, the smoke guide plate 8, and the arc-shaped air guide plate 13. This structure reduces the number of driving mechanisms while ensuring the coordination between the moving parts, thereby improving the oil fume adsorption efficiency and the overall reliability of the machine.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions, simple modifications, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A range hood with a smoke guide plate and a lifting air guide seat that open and close in linkage, comprising a main unit (1), a fan cabinet (2) installed on the top of the main unit (1), a smoke extraction module (3) installed inside the fan cabinet (2), the air inlet of the smoke extraction module (3) communicating with the inner cavity of the main unit (1), and the air outlet of the smoke extraction module (3) communicating with a smoke exhaust seat (4) located on the top of the fan cabinet (2), characterized in that: The air handling unit (2) has a smoke inlet (15) and a lifting port (16) below it. An oil filter screen (17) is provided at the smoke inlet (15). A guide seat (5) is installed in the lifting port (16) through a guide mechanism (6). The guide seat (5) moves up and down along the lifting port (16) under the drive of the lifting power mechanism (7). The air guide seat (5) has an inner cavity, and an auxiliary smoking port (18) is provided at the front end of the air guide seat (5). The auxiliary smoking port (18) is connected to the smoking module (3) through the inner cavity of the air guide seat and the inner cavity of the main unit (1). A smoke guide plate (8) is provided on the outside of the smoke inlet (15). The smoke guide plate (8) is hinged to the main unit (1) via a swing arm (9). The swing arm (9) is connected to the air guide seat (5) via a linkage mechanism (10). When the air guide seat (5) is raised or lowered, the linkage mechanism (10) converts the vertical linear motion of the air guide seat (5) into the rotation of the swing arm (9) to drive the smoke guide plate (8) to open or block the smoke inlet (15).

2. The range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 1, characterized in that: The guiding mechanism (6) includes a guide rail (20) fixedly installed in the lifting port (16). Correspondingly, a slider (21) is provided on the air guide seat (5), and the slider (21) is slidably connected to the guide rail (20).

3. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 2, characterized in that: The guide rail (20) and slider (21) are provided in two sets, and the two sets of guide rail (20) and slider (21) are symmetrically distributed on the back of the air guide seat (5).

4. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 1, characterized in that: The lifting power mechanism (7) includes an electric push rod (22) fixedly installed in the host (1). The movable end (23) of the electric push rod (22) is connected to the air guide seat (5) to drive the air guide seat (5) to move up and down along the lifting port (16).

5. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 1, characterized in that: There are two swing arms (9), which are symmetrically distributed on both sides of the smoke guide plate (8). The main unit (1) is provided with a hinge seat (11). One end of each swing arm (9) is hinged to the corresponding hinge seat (11), and the other end is fixedly connected to the back of the smoke guide plate (8).

6. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 1, characterized in that: The linkage mechanism (10) is provided in two sets, and the two sets of linkage mechanisms (10) are symmetrically distributed on both sides of the host (1); each set of linkage mechanism (10) includes a first link (24), a second link (25) and a third link (26). The first connecting rod (24) is hinged and installed in the host (1) through the hinge part (27). The first connecting rod (24) is provided with a first connecting part (28) and a second connecting part (29) at intervals. The first connecting part (28) is hinged to one end of the third connecting rod (26), and the other end of the third connecting rod (26) is hinged to the air guide seat (5); the second connecting part (29) is hinged to one end of the second connecting rod (25), and the other end of the second connecting rod (25) is hinged to the swing arm (9); When the air guide seat (5) is raised or lowered, the air guide seat (5) drives the first link (24) to swing around the hinge (27) through the third link (26). The first link (24) drives the swing arm (9) to rotate through the second link (25), thereby driving the smoke guide plate (8) to open or block the smoke inlet (15).

7. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 6, characterized in that: The host (1) has mounting cavities (12) on both sides, and two sets of linkage mechanisms (10) and two swing arms (9) are respectively installed in the corresponding mounting cavities (12).

8. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 1, characterized in that: The front end of the air guide seat (5) is provided with an inwardly recessed arc-shaped air guide plate (13), and the auxiliary smoke inlet (18) is opened on the arc-shaped air guide plate (13).

9. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 8, characterized in that: The air guide seat (5) has an opening (19) at the front end. The lower end of the arc-shaped air guide plate (13) is hinged to the lower part of the opening (19). Guide wheels (30) are provided on both sides of the arc-shaped air guide plate (13). The guide wheels (30) extend into the guide groove (14) provided on the side wall of the lifting port (16). When the air guide seat (5) rises to the storage position, the guide wheel (30) is guided by the guide groove (14) to retract the arc-shaped air guide plate (13) into the inner cavity of the host (1); when the air guide seat (5) falls to the working position, the guide wheel (30) is guided by the guide groove (14) to expand the arc-shaped air guide plate (13) outward.

10. A range hood with a smoke guide plate and a lifting air guide seat that open and close in conjunction as described in claim 9, characterized in that: The left and right sides of the arc-shaped air guide plate (13) extend backward to form side plates (31).

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